Conveyer



Nov. 25, 1930. x. w. HORNSEY CONVEYER Original Filed Sept. 8, 1925 Br His ahnen:

` i scribed apparatus used in `the ldirect reduc` Patented Nov.` 19301V i UN ITED STATES i PATENT JOHN WILLIAM` HoRNsEY, oF SUMMIT, News-anser, AssIGivoRlmo .GRANULAR IRON W i COMPANYU VA CoRyoRATION `OF MICHIGAN.

Original `applitatio'n filed September 8,

` `In a co`-pending application, Serial No,

134,287 iiled September 8, 1926, I have detion of oxidesof metals and have shown therein a specially "constructed conveyer adapted for transferring a hotcharge from one point to another; i y

The present application -is ,division of y the above application and is directed chieiyv to the improved structural features of the special conveyer. Y

The invention will be' fully apparent from the'following specification when read inconnection with the accompanying drawings, in which: v Y v Fig. l is a view of a portion cian apparatus used in the direct reduction of metals `with my improved 'conveyer embodied thereof Fig. 1. e

Fig. 3 is an enlarged cross sectional view of the conveyer taken on line of F ig. l.

Fig. 4 is an enlarged longitudinal section on line 4-4 of Fig. 2. Y

Referring in detail to the drawings, l is a rotary drum adapted to receive a charge of ore to be preheated therein. VThis drum projects into the open end 16 of a stationary cylinder l falls into a transverse chamber 20 formed in the stationary structure and onto a` grating 22 located above the inlet of an ore conveyer 23.' Alongside of the ore conveyer 23 is a coal conveyer 28. The ore conveyer is of special construction. It is important in apparatus of this character to feed -the ore, which is preheated'in the cylinder `1, in a hot state to the cylinder-24. This would ordinarily weaken the conveyer structure. IV propose Y to strengthen Vit in 1926; serial No. latest; Divided 18, 1929; serial No, 348,066.

` e Fig.` 2 is a transverse section on line 2--2` CONVEYER' andA Athis appiicatio ined :trainen `Theiconveyer'is housed withinthe shell 29 embedded in the brick work .ofithe stationary structure 126.` `Within'thisishelliOgthere is i i Within the Ttube l31 there is an inner tube 32,

This 1- inner tube `is hold the sama-in spaced `relationship` to the .preferably made of metal,"adapted to resisto :i high temperatures'.v formed with a number of lugs-32at serving to` inner 4wallof the intermediateptube 31; c This provides airspaces.A Ifdesired,'suitable heat insulatinginaterial may be Vused .in the annular dead zone between Athe innermost yshell Vand Athe intermediateshell." vThe conveyerm screwi23a is preferablyoftheiscrewtype and sist high temperatures; i. i

lis Vinadeof metal especially adapted to re` "The conveyer structure described` is par-` ticularly advantageous Vfornsesin locatlons Wvherej high temperatures are encountered.

WhereA materials such as coa-l and ore" are used in the presence of heat, sintering sometimes takes place which` tends to` block or "choke the conveyer., It is, therefore, advan- `tage'ous tof'employi a construction which .will

placement orrepair. The construction described permits ofsuchpwithdrawal, .its being apparent that if, for any reason, thejmaterial becomes packed or wedged sulificient-ly to interfere with the proper operation of the conveyer screw, the entire conveyer structure can be withdrawn as a unit by pulling the shell 30 out of the shell 29 which is embedded in the vbrick work.V The 'cooling water, or other medium, circulating between the tubes permit` withdrawahof` theconveyer 'fori re- 30 and 31 permits the maintenance of a tem- Y such an extent Vthat the parts will bind and thus `interfere with such withdrawal.` For maintaining the circulation of water in the space between the tubes 30 and 31, inlet and outlet pipes p, p are provided.

While I have described quite specically" pe'rature which will prevent expansion to! the construction of the conveyer illustrated, it is not to be construed that I am limited thereto, since various modifications may be made by those skilled in the art without departing from the invention as dened in the appended claims.

What I claim is:

l. A conveyer for hot material having a central conveyer tube, an intermediate tube separated from the first and having an insu-f lating medium between the two, and a third tube surrounding the intermediate tube with means for passing water between the intermediate tube and the third one.

2. In an apparatus of the class described,

-a stationary structure having a shell iXedly embedded therein, a central conveyer tube enclosing a screw conveyer, an intermediate tube separated Jfrom said conveyer tube to accommodate an insulating medium, and a third tube surrounding the intermediate tube, and means for passing water between the intermediate tube and the third one.

3. In an apparatus of the class described comprising a shell embedded in a stationary structure, a central conveyer tube enclosing a conveyer, an intermediate tube separated from the conveyer tube to accommodate an insulating medium, al third tube surrounding the intermediate tube, spacing means between said third tube and said intermediate tube, and means for passing water between the intermediate tube and the third tube.

4t. In an apparatus of the class described, a metal shell incorporated as an integral part ot' a. masonry structure, and a Water cooled conveyer loosely engaging said shell so as t0 be removable as a unit therefrom.

5. In an apparatus of the class described, a metal shell embedded in a masonry structure and a conveyer loosely mounted in said shell, said conveyer comprising a central conveyer tube, an intermediate tube separated from the irst to accommodate an insulating medium, and a third tube surrounding the intermediate tube with means for passing water between the intermediate tube and the third one.

In witness whereof I have hereunto signed my name.

JOHN WILLIAM HORNSEY. 

